Thevetia peruviana YELLOW OLEANDER (2 seeds)

Yellow Oleander, also known as Lucky Nut is an exotic plant with yellow flowers. It is a tropical shrub in the Apocynaceae family, native to Central and South America. This exotic tree is called "Napoleon’s Hat" because of its fruit, which is shaped like the famous bicorne hat worn by Napoleon.

Its leaves are long, narrow, and slightly leathery with a bright green tint. They are arranged alternately along the stems, and their glossy texture gives them an elegant appearance reminiscent of olive foliage.

Its flowers appear in terminal clusters and are often bright yellow, sometimes tinged with orange. Their funnel shape, with slightly wavy petals, releases a pleasant fragrance, making them a top choice for those wishing to add an olfactory note to their outdoor space. They appear in summer and can last for several weeks, adding a touch of vibrant color to the landscape.

The seeds of Lucky nut (Thevetia oleander) are yellow, oval-shaped, and the size of a hazelnut, generally weighing around 0.30 grams.

- Properties / Uses:

Landscape Architecture and Sunny Bloom

Often compared to Frangipani for the elegance of its habit, Yellow Oleander is a centerpiece of tropical horticulture.
Its graceful structure makes it an ideal subject to bring floral verticality and immediate exotic charm to outdoor spaces or large luminous verandas.

An Ornamental Plant to Handle with Caution

Recognizable by its evergreen foliage and bright funnel-shaped flowers, this tropical species is cultivated exclusively for its aesthetic and landscape value.
Due to the natural presence of complex compounds in its tissues and milky sap ("milky wood"), all parts of the plant are strictly toxic if ingested.

- Germination and Sowing of Seeds:

• The best period to sow yellow oleander is in June.
• Soak the seeds for 3 to 4 hours in lukewarm water before planting.
• Bury them 1 cm deep in previously moistened peat.
• Place the pots in a greenhouse at a temperature near 30°C.
• Germination of "Napoleon's Hat" generally takes 3 to 5 weeks after sowing.

- Substrate / Soil Type:

The Cascabela (another name for this genus) prefers well-drained soil consisting of a mixture of potting soil, sand, and compost to ensure good aeration and avoid water accumulation. A slightly acidic to neutral pH is also favorable for healthy growth.

- Exposure:

This plant requires full sun to thrive. A very bright location will allow it to bloom abundantly.

- Temperature / Hardiness:

Lucky nut prefers warm temperatures between 20°C and 30°C. It is sensitive to frost and must be protected from temperatures below 5°C.

- Watering:

Watering should be regular, especially during the active growth period in spring and summer. It is important to let the surface soil dry out between waterings to avoid root rot. In winter, watering can be reduced as the plant enters a vegetative rest phase.

- Multiplication / Reproduction:

Thevetia can be multiplied by seeds, cuttings, or layering (burying part of a stem while keeping the tip above ground, allowing it to develop roots).

- Pests / Diseases:

Yellow oleander is susceptible to various diseases including Anthracnose, a fungus that causes spots on the leaves, and Powdery Mildew, which produces a white coating on the leaves and can slow the plant's growth.

- Maintenance:

Prune dry wood in late winter and harvest the hat-shaped fruits as soon as fruiting ends.

This article was written by Julien on 07/25/2026.